The Obama administration conceded Friday that it would unlikely be able to muster political support for a second stimulus package, even if it wanted one.

White House press secretary Robert Gibbs said that the administration had gotten all it could out of Congress, in terms of another major stimulus package.

"Look, I think if you look at the politics of what’s going on on Capitol Hill right now, I think we got everything we could," Gibbs said in a gaggle above Air Force One, when asked if there was any consideration of a second stimulus by President Obama.

Obama is in Detroit Friday to promote the benefits of his signature $787 billion stimulus, as well as his decision to extend assistance to struggling automakers GM and Chrysler.

Republicans have assailed the stimulus as a failure, leaving the White House and congressional Democrats to launch a PR blitz on its behalf. Vice President Joe Biden, who's spearheaded the so-called "Recovery Summer" effort, has toured the country and made appearances with lawmakers to tout local programs funded by the stimulus.

Those efforts were undercut to a degree by GDP numbers for the second quarter showing growth had slowed in recent months. The GOP has also hammered away at persistently high jobless numbers.

Still, some Democrats, as well as outside groups — many in organized labor — have long pushed a second stimulus to support the economy and create jobs. While there has been no formal second stimulus bill put forward, House and Senate Democrats have pushed a number of individual spending bills, including extending unemployment insurance, and measures to provide a tax credit for new hiring and small-business lending.

Gibbs pushed lawmakers to set aside politics and focus on economic growth.

"I mean this shouldn’t be a partisan issue, and if it was a partisan issue yesterday, I hope that that caucus will take a look at the statistics that we’ve seen today, reacquaint themselves with the 8 million people that have lost jobs ... and hopefully do some thinking over the weekend to put aside some of their partisan and ideological bents to help the American people make some progress in this economy," he said.